Chats [NIP-C7] Positive Interoperability Tracker

[alltheseas]

spec: https://github.com/nostr-protocol/nips/blob/master/C7.md
PR: nostr-protocol/nips#1591 (merged 2024-11-21, author: hodlbod/staab)
Related: #93 (NIP-29 relay-based groups)

Kind 9 — simple chat messages, extracted from NIP-29 to be reusable independently. Replies use q tags with shallow hierarchy. Often used with NIP-29 groups (h tag for group ID).

app	NIP-C7 (kind 9)	comment
Flotilla	✅ yes	MESSAGE = 9 via welshman Kinds.ts; room subs use MESSAGE_KINDS with #h tag
Chachi	✅ yes	GroupChat = 9 + buildGroupChatEvent() builder; by Verbiricha
Groups	✅ yes	9: 'chat-message' mapping; sendGroupChat() via nostr-hooks/nip29
nostr-chat-fyne	✅ yes	Go desktop client; Kind: 9 in sub filter + event creation
OpenClaw-Nostr	✅ yes	KIND_GROUP_CHAT = 9; AI agent NIP-29 plugin
Grimoire	✅ yes	kind: 9, nip: "C7" explicit; dedicated Kind9Renderer; by purrgrammer
Amethyst	✅ yes	v1.07.0: ChatEvent KIND=9, q-tag replies per spec, feed + thread rendering. evidence: PR #2018, nipC7Chats/ChatEvent.kt
White Noise	✅ yes	v2026.3.23: NIP-C7 q-tag reply threading with content stripping. evidence: PR #468 (Flutter), PR #581 (Rust backend — extract_reply_info() + strip_reply_event_reference() in processor.rs)

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Schema

Validate implementations against nostrability/schemata:

• kind 9

[staab]

Coracle does not implement c7

[alltheseas]

thank you ser for being a hallucination detector.

updated table.

added evidence of implementation.